Composite Enamel Coatings for Thermal Shock and Chloride Corrosion Coupled Environments

In some special cases, steel substrates may suffer the coupled threats of chloride corrosion and elevated temperature, requiring both high-temperature and corrosion protection. Enamel coating has been utilized to protect metallic substrates against corrosion and has proven to be effective. Recently, silicon carbide and silicon nitride were added to pure enamel coating and the composite enamel coatings were developed. Results showed that the composite enamel coatings had excellent thermal shock resistance, good corrosion resistance, and sufficient cracking resistances. Due to these improvements, the composite enamel coating became a candidate material for applications in thermal shock and chloride corrosion coupled environments.